摘要
航天电连接器具有可靠性高、寿命长的特点,为解决其接触可靠性评估问题,通过分析其接触失效机理,指出在温度应力下的接触失效物理模型为Arrhenius方程,接触寿命服从两参数的Weibull分布,并在此基础上建立了接触可靠性统计模型;研究了航天电连接器步进应力加速寿命试验方法,利用极大似然估计和Nelson累积失效模型,提出了试验数据的统计分析方法。通过对某型航天电连接器实施步进应力加速寿命试验,得到了正常温度应力水平下接触可靠性特征参数估计值。研究结果表明,提出的模型与方法是有效的。
In order to evaluate the contact-reliability of aerospace electrical connectors with high reliability and long life,the contact failure mechanism of aerospace electrical connectors was analyzed,the failure physics model was the Arrhenius relationship and the contact life followes Weibull distribution under the action of temperature stress were indicated.On this basis,the statistical analysis for step-up-stress accelerated life test data was established,which was derived from maximum likelihood estimation theory and Nelson failure model.Through step-up-stress accelerated life test and data statistical analysis the estimated value of the reliability character of one type of aerospace electrical connectors was yielded.The results indicate that the proposed model and the algorithm can obtain satisfactory solutions.
出处
《机电工程》
CAS
2011年第2期172-175,183,共5页
Journal of Mechanical & Electrical Engineering
基金
国家高技术研究发展计划("863计划")资助项目(2007AA04Z409)
国家民用航天科技预研资助项目(B1220062302)
浙江省自然科学基金资助项目(Y1080762)
关键词
步进应力
加速寿命试验
航天电连接器
可靠性评估
统计分析
step-up-stress
accelerated life test
aerospace electrical connector
reliability assessment
statistical analysis
